Amazon has just announced a new feature that allows you to add items to your shopping basket by including a hashtag in a tweet.
Once you've connected your Twitter and Amazon accounts, you'll be able to reply to Amazon product links seen on Twitter with the hashtag #AmazonCart -- or #AmazonBasket in the UK -- and the product will be immediately added to your basket. Importantly it won't be purchased: you'll still have to head to Amazon's site to buy it. Instead, it's an "add it now, buy it later" kind of thing, in Amazon's words.
One point worth noting: these tweets will be public, so you might want to choose what you buy with some care. Indeed, that might be exactly the point: it feels rather like Amazon is taking word-of-mouth advertising onto Twitter. [Amazon]